port_forwarding

#!/usr/bin/env ruby

forwardings = { # sample
  hoge: 'hoge.com -L 58010/10.120.1.10/3306',
  fuga: 'fuga.org -L 58011/localhost/3306',
  unko: 'unko.com -L 58012/222.222.222.222/3306'
}


forwardings.each do |k, v|
  puts "* #{k}"
  puts "  #{v}"

  exists = `ps aux | grep "#{v.split(/\s+/).last}$"`
  `kill -9 #{exists.split(/\s+/)[1]}` unless exists.empty?

  fork do
    exec <<-CMD
      ssh -N \
      -o ControlMaster=auto \
      -o ExitOnForwardFailure=yes \
      -o ConnectTimeout=10 \
      -o NumberOfPasswordPrompts=3 \
      -o TCPKeepAlive=no \
      -o ServerAliveInterval=60 \
      -o ServerAliveCountMax=1 \
      #{v}
    CMD
  end
end